Locking and tripping device for switches.



E. M. AOLY.

LOOKING AND TRIPPING DEVICE FOR SWITCHES.

APPLICATION FILED NOV-17,1904.

Fig. 4. Fig. '5

G F F d mumm D F G H b E v KL k, 0 '0 C 2 J I J LL M I E? B NY A Witnesses. lnventdr:

: Nccrrg M. Jqclgq y MM Jqtfd g PATENTED JUNE 39. 1906- *Umfrnn STATES reruns carton.

HARRY lit. ACLY, OF PXTTSFiE-LD, hiiASSACHUSETTS, ASSYGNOB. TU STA LEY ELECTRIC MANUFACTURlNG- COMPANY, OF PIITSFIELD, MASEA GHUSE S, A CORPORATION 01 NEW JERSEY.

fipecifieation of Letters Patent.

LGQKHQG ANU TFXEPPiNG DEWGE FOR QWETCliES= .Eatented June 19, race.

Application filed November 17,1904. Serial No. 233,082.

. is a specification.

- My invention relates to automatic switches or breakers for electric circuits; and its object is to provide a novel form of locking and tripping devices for such switches, which is exceedingly simple in construction and reliable in action.

My invention will best be understood by reference to the accompanying drawings, in which Figure 1 shows a side elevation of a circuitbreaker provided with a tripping device an ranged in accordance with my invention.

Fig-I 2 shows a similar view oi the circuit breaker at the instant of opening, and Figs. 3 and 4 show detailed views of: the locking evice.

In the drawings, A represents the operating-handle by means of which the switch is closed. This handle is pivoted to the outer end of the links B, the inner end of which is pivoted at b to the switch-support. Handle A is also pivotally connected to the contact carrying member C, one end of which is also pivoted at c to the support. The member 0 is provided with. a step c, of yielding material, such as rubber, adapted to be engaged by the handle A to limit the movement of the switch when opened, as shown in Fig. 2. Secured to the member C is the switch-contact=D, which I have shown as. of the usual form of laminated brush supplied'w th auxiliary contacts d d to receive the are when the switch is opened. The specific to in of manual operating mechanism for closing the switch and the specific form of switch-contacts form no part of my invention, which is applicable to switches of any well-known construction.

Secured to the member I) by the link E is the rod F, longitudinally movable in the guide G and normally piresse'd, outward by the compression-spring This spring thus tends at all times to 0 en the switch; The guide G is formed with a sloping ridge 1 beneath the rod F, and between the ridge 1 and the rod F is placed a roller 5. T a ro F is preferably square, as shown or formed.

with. a flattened bearing -suriace for the roller. The roller die at all times pres. d forward into theposition shown by the i'ollower "K and its actuating compression-spring k, as is clearly-shown in'Fi 3. Thus when the switch is closed by pus ling handle A in ward into the position shown in l the roller J is maintained in the osition shown in en agement withboth rod F and the inclined ridge during the inward movement of the rod F. W hen the switch is closed and the handle A is released, the pressure ofcomression-s rin tends to move red Font wardly to open the switch, and its tendency to movement only looks the roller J more firmly in position, so as to wedge the rod F firmly between the roller and the upper ortion of the guide G. The switch is thus eld closed against the pressure of spring H.

L represents a toggle-lever,. one end of which loosely engages the roll r J by pinand-slot connection. The central portion of the toggle L rests upon apin Z, whichis supported in guide G, as shown, directly above the tripping-magnet M. The core m of the trippingnnagnet is normally held in'the position s amount of current flows through tripping. n

iown in Fig. 1 by a spring m or by gravity, or both. When the predetermined as shown in Fi 2. The roller J is'thus forced backward momentarily, com ressing the spring 7: and releasing the rod 1*. The switci i I have shown the core m provided with a tripping-lever N extending through the What I claim as new, and desire tosecure by Letters Patent of the United States, is

is consequently free to open under the. pressure of the mainspring H;

1. In a locking and tripping device, in con1- bination with a movable member and means ten ding to move saidrnem'ber, an independ ranged between said member m sam roller, an electioniagnet, and op" ently-movabie iociring-piece to incl; said Inembv r by friction al engagement there-- With said member and lockine-piece being arranged th at the pressure of said noving means on said member produces said engagemerit, an electromagnet, and operative connections between said magnet and said iO-ciiing-piece whereby said lockingpiece moi ed from loclrin position.

2. In a 100 ,ing and tripping device, in combination with a movable member and means tending to move said member, an independentiy-1novabie locking-piece frictionally engaging said member and adapted to be tending to move said member, incllned to said member, a arface, means for holding said roller in contact with said member and 5 face, the tendency of said member to 1 under the pressure of said moving means being in a direction to increase the pressure on 'ative said connections between said magnet roller.

5. in locking and tripping device, in combination with a movable member and mea s tending to move said member, a suriaceim clined to said member, a friction-rollerac ranged between said member and said surface, means for holding said roller normaily in contact with said member and said sur face, the tendency of said member to move under the pressure of said moving means being in a direction to increase the pressure on said roller, a toggle-joint adapted to move said roller out of engagement with said mein magnet.

and an electromagnet actnng'upon said 7. in. combination, switch member, longitudinally-romp: coating rod secured thereto, spring tendin to open'said switch, surface ed betiveer i said rodand said faee, tendency to movement of said rod under t pressure oisaid spring being in a zi ieGti, to edge'said roller beti f i inclined surface, a spring.-p esse r lie -minornally maintaining said roller in. el'lg'ag merit Vfiilifiznid rod and said in L d surface, an electrcnxagnet, and operative connections between said electromagnet and said roil;

8. I11 combination, a switch member, a gitudinally reclprocating rod secured thereto, a spring tending to open said switch, surface incl'ined to said rod, friction-roller mounted between said rod and said surface, the

inclined tov saio rod, a frictim-roiler ioiinr tendency to movement of said rod under the pressure of said spring-being in a .directi Wedge said roller between said rod and in surface, a toggleoint loosely ens 'w d an ezect-r magnet acting n 9. in a iOCiilllP' and bin-a tion with iongitudinaiiy-niovabie r and a spring tending to move aid rod, guide bee-ring st one surface of said rod, a Friction-robe: bearing the opposite suriace of said rod, a suriace inclined to said rod and ade to support said rolier, and an electromagnet operatively connected to said rolier.

in Witness whereof I have bereunto my band this 15th day or November, 1904,

LARRY M, AOLY.

Witnesses:

simmer, E. WiDDiFEELn, HELEN P. SMITH.

tripping device, in comglng said 

